154538299872 has 384 divisors, whose sum is σ = 504132733440. Its totient is φ = 46041177600.

The previous prime is 154538299831. The next prime is 154538299879. The reversal of 154538299872 is 278992835451.

154538299872 is a `hidden beast` number, since 1 + 5 + 4 + 538 + 2 + 9 + 98 + 7 + 2 = 666.

It is a super-2 number, since 2×154538299872² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154538299879) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 70147923 + ... + 70150125.

It is an arithmetic number, because the mean of its divisors is an integer number (1312845660).

Almost surely, 2^154538299872 is an apocalyptic number.

154538299872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154538299872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252066366720).

154538299872 is an abundant number, since it is smaller than the sum of its proper divisors (349594433568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

154538299872 is a wasteful number, since it uses less digits than its factorization.

154538299872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316 (or 2280 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 63.

The spelling of 154538299872 in words is "one hundred fifty-four billion, five hundred thirty-eight million, two hundred ninety-nine thousand, eight hundred seventy-two".